@article{oai:tsukuba.repo.nii.ac.jp:00035800, author = {Tagawa, H. and 梅村, 雅之 and UMEMURA, Masayuki and Gouda, N. and Yano, T. and Yamai, Y.}, issue = {2}, journal = {Monthly Notices of the Royal Astronomical Society}, month = {Aug}, pages = {2174--2184}, title = {Early cosmic merger of multiple black holes}, volume = {451}, year = {2015}, yomi = {ウメムラ, マサユキ} }